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Forum Maschinenbau Rostock • Thema anzeigen - 32.3

32.3

32.3

Beitragvon BrixBrox » Sa 10. Nov 2012, 23:18

Hey habt ihr da schon ein ergebnis für M,xs,ys?
Also ich hab das so Bild aber ich komm da auf kein richtiges ergebnis. :evil:
BrixBrox
 
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Registriert: Mi 5. Okt 2011, 16:25

Re: 32.3

Beitragvon Anna » So 11. Nov 2012, 12:30

Ja, so hab ich das auch (jedenfalls für M)
Das gibt ja einfach Intergal von Pi/4 bis 0 über (cos(y)-sin(y))dy udn das ergibt dann [sin(y)+cos(y)] Pi/4 bis 0 und das ist ....

Und für xs rechnest du das gleiche nur mit x statt 1 als Funktion, das wird dann schon eher kompliziert, aber noch besser rechenbar als in 32.2...
zur Kontrolle: bei mir kam da 1/(4*(wurzel (2)-1)) raus.
Anna
 
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Registriert: Di 22. Nov 2011, 20:30

Re: 32.3

Beitragvon BrixBrox » So 11. Nov 2012, 15:46

Hab den normalbereich jetzt so: Bild
und komme für M= 2-Wurzel(2)
xs= 0,244
ys=pie/4
BrixBrox
 
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Re: 32.3

Beitragvon Bias » So 11. Nov 2012, 16:03

Hab das genauso, aber ist genau genommen beim geometrischen Schwerpunkt das M nicht eher ein A, also die Fläche. Eine Ebene kann doch keine Masse haben.
Bias
 
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Registriert: So 11. Nov 2012, 15:38

Re: 32.3

Beitragvon BrixBrox » So 11. Nov 2012, 18:30

oh ja stimmt. Danke ;)
BrixBrox
 
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Re: 32.3

Beitragvon ole » So 11. Nov 2012, 18:52

Ich weiss nicht woran es liegt, aber ich komme bei deinem Bereichsintegral auf M=1 als Lösung..wo ist der Fehler?
ole
 
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Registriert: Mi 17. Okt 2012, 08:28

Re: 32.3

Beitragvon BrixBrox » So 11. Nov 2012, 19:35

Hab ja mein Normalbereich geändert. So müsstes du aufs richtige ergbenis kommen: Bild
BrixBrox
 
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Re: 32.3

Beitragvon chalshokhi » Di 24. Feb 2015, 07:03

Hab das genauso, aber ist genau genommen beim geometrischen Schwerpunkt das M nicht eher ein A, also die Fläche. Eine Ebene kann doch keine Masse haben.???



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chalshokhi
 
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